Product Description : 1. Flexibility: Copper-plated iron material gives the brake pipe good bending ability, easy to install in complex spaces. 2. Complete Accessories: The set includes 16 inverted pipe nuts , suitable for a variety of connection needs, convenient for users to choose. 3 .Wide Application: Suitable for hydraulic brake system, fuel system and transmission system, as well as domestic, industrial and commercial scenarios. 4. Reasonable Size: Pipes are available in 25-foot lengths with 3/16-inch (4.8 mm) outside diameters to meet a wide range of applications. Package Contents: 4 x Galvanized Copper Brake Pipe 25FT (7.6M) 8 x 3/16” (7/16-24) Nut 40 x 3/16” (3/8-24) Nut 8 x 3/16” (1/2-20) Nut 8 x 3/16” (9/16-18) Nut.